Question

subpunctul b
calculati a+b+c si a-b+c​

Answer 1

Răspuns:

a=3✓5-2✓5-4✓3+2✓3

a=✓5-2✓3

b=7✓3-4✓3-2✓5+3✓5

b=3✓3+1✓5

c=5✓5-3✓3+5✓3-2✓5

c=3✓5+2✓3

a+b+c= ✓5-2✓3+3✓3+1✓5+3✓5+2✓3

a+b+c= 5✓5+5✓3

a-b+c= ✓5-2✓3-3✓3+1✓5+3✓5+2✓3

a-b+c= 5✓5+10✓3